Question

In the figure, if AB || CD, then angle EFD is equal to:(a) 50(d) 40(c) 20(d) 30​

Answer 1

Answer:

d. 40°

Step-by-step explanation:

70-30=40°

Answer 2

Answer:

d) 40

Step-by-step explanation:

AB || CD,  so ∠DCB + ∠ABC = 180    { co interior angles }

                        ∠DCB + 70 = 180

                                    ∠DCB = 180 -70 = 110

∠FCE = ∠DCB   { Vertically opposite angles }

∠FCE = 110

In triangle CFE

∠EFD + ∠CEF + ∠FCE = 180    ( sum of angles of triangle)

∠EFD + 30 + 110 = 180

∠EFD + 140 = 180

∠EFD = 180 -140

∠EFD = 40